I Can't figure out what is going on; I've played around in the battery settings; but maybe I'm just too Green to my used 17 Inch Macbook Pro that I bought 3 months ago. I used to have a full battery at night, close the lid go to sleep and have hardly any battery loss first thing in the morning. Now, I close the lid or even manually put the Macpro to sleep ( from the apple menu ) and wake 8 hours later with " NO" battery. Someone help, whats going on? what do I need to check? what do I need to set? this is getting frustrating. the battery is still strong get about 3 hours on a full charge; it's a mac battery; so It must just be settings or something I need to do in the software. Takes.